A Dual-Mode Latching Reciprocal Ferrite Phase Shifter

Boyd, C.R.

doi:10.1109/tmtt.1970.1127421

Cited by 40 publications

(5 citation statements)

References 3 publications

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“…The phasor section is simply a variably Faraday rotator. It is realized in both circular and rectangular cross sections (Boyd 1970).…”

Section: Types Of Ferrite Phase Shiftersmentioning

confidence: 99%

Microwave ferrites for phase shifters

Kishan

1995

Bull. Mater. Sci.

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The electronically steerable phased array radars [PARs) are finding extensive use in military, communication and civilian applications. A PAR system typically comprises a regular arrangement of a large number of phase controlled radiating elements. Ferrite-based phase shifters in various designs are employed in these systems operating at frequencies above 5 GHz due to their superior power rating and insertion loss characteristics. Under DRDO's integrated missile programme considerable success has been achieved in the country on the development of ferrite materials, phase shifters and array system. The work done at SSPL on the development of ferrite materials for both X-and C-band phase shifters is described. The effect of various substituents in the chemical composition of the lithium-titanium ferrites and of the process parameters to evolve the grades with required magnetic, electrical and microstructural properties are discussed. The investigations carried out to enhance optimally the r.f. power handling capability of the material for meeting the desired specifications of the C-band phase shifter are also given.

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“…The phasor section is simply a variably Faraday rotator. It is realized in both circular and rectangular cross sections (Boyd 1970).…”

Section: Types Of Ferrite Phase Shiftersmentioning

confidence: 99%

Microwave ferrites for phase shifters

Kishan

1995

Bull. Mater. Sci.

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“…Microwave phase shifters (PSs) have been widely used in communication systems, radars, particle accelerators and so on. The conventional high power waveguide phase shifters are basically ferrite PSs, mechanical PSs, or electrically controlled PSs, including ferrite PSs, [1][2][3][4] dimension mechanically adjustable PSs, [5][6][7] and p-i-n diode waveguide PS. 8 The insertion loss of ferrite decreases the efficiency of the PS, and the power capacity is limited because of the breakdown of the ferrite material under the intense electromagnetic field.…”

Section: Introductionmentioning

confidence: 99%

The design of optically controlled phase shifter based on silicon photosensitivity

Meng

Xia

Yongguang

et al. 2018

Micro & Optical Tech Letters

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Based on the photosensitivity of silicon, a novel optically controlled microwave phase shifter is proposed, which consists of a Xenon lamp and a rectangular waveguide inserted with a silicon slice. By altering the intensity of illumination, the presented structure can change the phase of transmission coefficient efficiently. The performance of the phase shifter is theoretically analyzed and simulated. Experiments are conducted at X band, and the results show that a phase shift of 44° can be obtained, and the insertion loss is 5.8 dB. Especially, the power capacity of the presented structure reaches to 460 MW under vacuum state according to the simulation, which is far greater than traditional microwave phase shifters. This novel structure is attractive for high power microwave (HPM) applications.

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“…Thus, numerous research and development efforts on both reciprocal and nonreciprocal ferrite phase shifters have been reported [5,6]. Boyd Jr. [5] used a pair of similar nonreciprocal phase shifters with circulators at both input and output to produce a latching reciprocal phase shifter over a 10% bandwidth at X-band. Although the fabricated device supported the peak power of up to one kilowatt at room temperature, the design suffered a considerable loss attributed to alignment errors in the polarizers and fabrication processing.…”

Section: Introductionmentioning

confidence: 99%

Microrectangular-coaxial phase shifter for microwave devices

Sholiyi

Williams

2015

Int J RF and Microwave Comp Aid Eng

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This article reports the simulated performance of rectangular coaxial ferrite phase shifter at Ka-band. The proposed technique exploits rectangular coaxial waveguide with a symmetrically placed inner signal conductor inside an outer conductor connected to the ground. Strontium ferrite-SU8 composite is used as an anisotropic material of choice in the modeled design. Two model phase shifting structures were designed for reciprocal and nonreciprocal applications using High Frequency Structure Simulator, HFSS. The reciprocal model produced a tunable phase shift of almost 60 =cm across 0 to 400 kA/m applied field and at 1800 Gauss. The predicted simulated performance of the nonreciprocal phase shifter was 20 =cm from a reference phase of 24 at 0 A/m at the same saturation magnetization. A return loss better than 20 dB and an insertion loss less than 1.5 dB were predicted for the two models. V C 2015 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:502-509, 2015.

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A Dual-Mode Latching Reciprocal Ferrite Phase Shifter

Cited by 40 publications

References 3 publications

Microwave ferrites for phase shifters

Microwave ferrites for phase shifters

The design of optically controlled phase shifter based on silicon photosensitivity

Microrectangular-coaxial phase shifter for microwave devices

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